Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 09, 2018 - September 12, 2018
A novel numerical simulation method based on finite element analysis (FEA), which can evaluate the fracture probability caused by the characteristics of flaw distribution, is considered an effective tool to facilitate and increase the use of ceramics in components and members. In this study, we propose an FEA methodology to predict the scatter of ceramic strength. And the influence of effective volume can be expressed by proposed FEA methodology. First, we obtained microscopic tissue information from ceramics images and transformed them into fracture mechanics models, we numerically create a Weibull distribution based on multiple FEA results of a three-point bending test. Its validity is confirmed by a quantitative comparison with the actual test results. Next, by analyzing with different test specimens and test method and creating a Weibull distribution, it was shown that as the effective volume becomes larger, the strength decreases and the variation becomes smaller. In this way, the relationship between breaking strength and effective volume could be evaluated.
